I recently obtained the Alesis IOI14 firewire interface, which is a DC-coupled audio interface. With the VST plugin like Silent Way Voice Controller, I can generate CV outputs from PC/DAW and modulate the sounds of my Mood mother 32, Werkstatt-01 and Roland SE-02 by CV(Control Voltages).
I also connected the Alesis IOI14 into my main home audio interface, RME Fireface UCX via S/PDIF and it added 4 extra analog audio inputs. Now I have total 26 audio inputs in my setup.
After many experiments, I figured out how this works out in my setup.
I am working on using EWI(breath controller) and other midi controllers(or DAW) together to create unique lead sounds.